That's a little subjective. I would go to your local B&M, pick out a few models that you are interested in, and play with the motion interpolation settings and see for yourself. They have different names depending on the mfr so you may have to ask the salesperson.

Me too.
Get a Samsung, it has the best most SOE tweakings options.
The (Auto) Motion Plus with 2 adjustments: Blur Reduction 0-10 and Judder Reduction 0-10 for fine tuning.
And there's also the option LED Motion backlight strobing for further reduction blurring.

If I get a 60f8000 which settings do I use to get the most of the soap opera effect?

Look for LED MotionPlus in advanced picture settings. Off is no effect, play around with the others. At least that's what it's called on my Samsung D8000. Maybe they renamed it due to customer backlash. Lot of reviews where people returned this TV because they couldn't figure out how to turn it off, or know that it could be turned off. It actually looks ok on some content, but for TV watching its just atrocious in my opinion.

Television viewing is a personal preference experience. There is no right or wrong.

That's a common misconception. Unlike audio, there actually are very clear standards and calibration targets for video. There is a very well defined "right" and "wrong" in video. Having that industry-wide standard is the only way that TV and movies can be made. Otherwise, all of the color correction, detail, motion and director's intent would vary wildly depending on which TV was used during the production process!

Every display that was used to actually make the content was calibrated to the exact same industry standards. In other words, every display looked identical. If a display does not look identical to that industry standard, it is wrong -- no ifs, ands, or buts. As a result, the only thing that makes sense when you are watching at home is to also adhere to those same industry standards. That is what ISF and THX calibrators are for. They're not adjusting your TV "to taste", or just eyeballing the results.

If you want to deviate from the industry standards, yes, as a viewer, that is your prerogative. But there IS a right and wrong. If you're aware of that, and you decide that you want to be wrong, that's ok

That's a common misconception. Unlike audio, there actually are very clear standards and calibration targets for video. There is a very well defined "right" and "wrong" in video. Having that industry-wide standard is the only way that TV and movies can be made. Otherwise, all of the color correction, detail, motion and director's intent would vary wildly depending on which TV was used during the production process!

Every display that was used to actually make the content was calibrated to the exact same industry standards. In other words, every display looked identical. If a display does not look identical to that industry standard, it is wrong -- no ifs, ands, or buts. As a result, the only thing that makes sense when you are watching at home is to also adhere to those same industry standards. That is what ISF and THX calibrators are for. They're not adjusting your TV "to taste", or just eyeballing the results.

If you want to deviate from the industry standards, yes, as a viewer, that is your prerogative. But there IS a right and wrong. If you're aware of that, and you decide that you want to be wrong, that's ok